How did henry ford affect industry in general in detroit?

Which would make the best heading for this list of notes about the migration of african-americans during the reconstruction era?

Who was william johnson? a. a revolutionary war veteran b. was the most prominent free black in mississippi c. a field slave d. inventor of the cotton gin

Which of the following elements is not typical of an advanced society? a. cities b. science c. industries d. and nomadic lifestyle